21231230200 has 48 divisors (see below), whose sum is σ = 49851396360. Its totient is φ = 8408400000.

The previous prime is 21231230101. The next prime is 21231230213. The reversal of 21231230200 is 203213212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 505326 + ... + 545725.

Almost surely, 2^21231230200 is an apocalyptic number.

21231230200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21231230200 is an abundant number, since it is smaller than the sum of its proper divisors (28620166160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21231230200 is a wasteful number, since it uses less digits than its factorization.

21231230200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051168 (or 1051159 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21231230200 its reverse (203213212), we get a palindrome (21434443412).

The spelling of 21231230200 in words is "twenty-one billion, two hundred thirty-one million, two hundred thirty thousand, two hundred".